Tire valve and cap



July l, 1930. w. H. DAVID TIRE VALVE AND CAP 2 Shoots-Sheet 1 Filed Nov. 26, 1926 Fim.'

a fnl-TNESSES July l, 1930. w. H. DAVID TIRE VALVE CAP 2 shuts-sneu 2 Filed Nw. 2e, 192e F'IGS.

- mvEN-ro wrrNEssEs L 4f,

1:25 length than said usuall valve Cap.@

Patented July l, 1930 :PATENTom@f l WILLIAM H1 DAVID, or TOTTENVILLE, New YORK Y rmi; YVALVE' Aim ohr` Abpiiation mea `ummm ze, y i926. 'serial NpQ 1150,915'.`

" f invention: relates totirevalves'and use onfsuoh usual tirevv'alves, orvalves of t the usualbr ordinary size,y by the substitu- V.10' Ition of valvev cap thereon in.'y place gof A,the usual valve oap.`

The' tire valves ordinarilyI used' heretofore A vary in some .of-theirifeatur'es butf,1gs`o far asI aiiiaware,thefreduoed threadedxupper C endof the'valve"oasing,onuvvhioh thfevalve Ao ap screws," isf the samefsize Linlall [cases and "the, internal diameter' of the dustcap is sub- Sentiauy the'` Samein; au Cases-'My y im- Prove@ Valve ffap" isiihreadedto screw, onto Y -207th-e` fedilf'd threaded .upper end! of; the

,usualoasjing," end it "is of substantially the same sized j vlfdiameter as "the `usual Cap, so

thsigtythe usual' dustfefap will' 'passftherepvrg ut fniyY valve?, 'cap' "is of materiallyfgreater The reason; for mak? gV m l'resilient member in' the oa'pj'for sealing the top of f the Lvalve easing, instead ,ofk the* thin v 30" "disey packing heretofore ordinarilyA used l in the usual valve caps,y My :large fsealing "jmember"vvill" obviously maintain its resilienoy (sealing li'fe') muh' longer'funderlthe seaIingpreSSure, thansaid thinV `dise pack- ..35ing;*"l` l11'1`s*myV improved sealing member n *will constitute anair' tight seal '-fora much glo'ngerliperiod fand it `Will also remain fric- L tion tight :and Continue to fresist,thejars and 'joltsr of' the' going car. ',(WhiohV tend to :40a loosen .the cap so, that `it Tfalls off -of;theasging)for-periodsproportional tothe longer 4525 ing-'member is'that if Vbe, lmadey ball shaped vror v convex fon-theeentralportion y Q'fi'tst Fig. i1' is ian: enlargedvertlcal V'lovver surfac'e,"it will, Vduetoitslargefre- Lflonger' than the said usual Gap, but it also v'differs in lthis Vadditional"respect,` namely fore' the cap is. finished; The reasonforameter than'the threaded-.bore of the neck, v and in both cases the diameter .of the sealing 'member is larger than said bore'. But inthe l'oase/of the usual valve 'cap said thin packing *Y small "enough to b erfpushed throu h' vsaid valve vcap l `llonger is in" order` to employa largefsoft Y l `provedfsealing member'fis `toolo'ng'to be silientl mass, under -j 'thelfsealing 'pressure, i erovvd l'down into'the bore foi the" casing u and engage the 1.usuavjl j' delajtling and *upper end-fof` the valve k casing to the open the check valve substantially simultaneouslyv With vthe sealing of the topl of the easing. This will Iobviolkisly kgrea'tl lengthenthe lifel of the Cheek valve, a'n with my large sealingmember, is: safe pracjtiee,"because the latter Voonstitutes a reliable "air tight, friction `tight seal for the whole period of lifefof the irmer tube.

, Not only"is"1my yimproved valve cap that, Whereas said usual ap is hiinishedand the paoking'washer then inserted, my sealing member must be inserted inthe cap; be- I this difference the following, viz: 1 1

In both cases, kminek and'gtheusual valve Y cap, the sealingmember is vcontainedinanV n t internal ohamber] above and of larger: d-

washer can f be collapsed into""diameter boref and Vwill then reassume its atfdiscV form` in the enlarged'ohamber, iBut my im- "ber, and thenthe cap can be finished, 'with the sealing member therein, Whichiit thus servestoeonfme., n Y ,l i; y lVlfitlio'utinany Wayv limiting the scope of myinvention, I `Call attentionthat improved Avalve, oapy and: sealingV member therein are particularly' valuab e Vin connection vvith=balloontires, ibeoause of the lov/vv air pressure' therein and the consequent ,90

needo oonningsuch 'pressure ."'within minimum limits.

nr the drawmgs, which ferm` Vaf part of y thespeoificatiom have shown `my improvements applied to the Wiell knownv Schrader 95' valve. Referring to the drawings sectional vieu/,bf one-forni ofmyimproved valvecap and sealing pmembe; Vand" :af portion 4ofi the 1 lestes Cap `is applied. `In `this View the sealing valve is closed, the check valve is open, and

' the usual dust cap is shown assembled on the valve easing over my valve Cap.v

' Fig. 2 is a VView Corresponding with Fig.

:1 but. with, the sealing ssemandh@ cheekgiyalve elo the dust cap notbeing shown.y i i i 1 Fig. 3 is an enlarged vertical sectional 10 VView of a modiliedfarm Qitheldnyentqmr. 1

'In each ofthe forms shown the sealing member is of diameter larger than there` duc'ed upperend vof the yalveeasiug appl eeX?)-V tends completely aeross"andovertl1e easing,

ren 011` relish .reses-1 Hesse E. pressure willie@ mais' tained-inthe lesen-.mths

,elle 'f1 le webmaster messer;

.ie .J farssefmegldwn Y to'l seal -the latter;

es Elia adrideslsmrts '50 .semblies. desisnatedb frssfQllew .stes "115142.41 wwwa?" bbigprale i "Tthmegggsfss te n.1 thread in the upper nd .6 @i @heave e weisen-.ing

' sin@ ya @new l:- "ln ang, Mathe. .5.2, where the sealing Valyes QP ...de atngstem lirahessbers Phesweva s to .the top. of .the .asingmhkeas ligsgl, 'l .wlierethefseal is.closed,.the stem slfshQrilld fiaboveltliatlirie. This udicatesthatinolos "t Yin'g'tlle `seal,;lie5ball...has also...formedtheVFA Y 7 is the sealing member in the cap of Fig. 3. v

. 8 is the swivel sleeve in the l and 2.

9 is the central housing of 'the built up caprojgFigslvlvand 2.

10 "stile topgliousilgf the cap of ligs. 1 and 2." Tlie central aiid tdp housings, 9 and-10, are rigidly secured together afteihtbe insertion of thesleeve and sealing member. v lil is'the usual dust cap.

12 is tlie" reduced extension at the top of .thelvalve Cap', "provided at` its upper. end l .Wthtthe .capmember for the usual .Soket K yrerlcli i:pr .srjewirg :tliezl-felieek V'alfve Iinto and out ofthe `Valve casiil .j. the usual d elating s ye valyal., Y

.indieas'sshe' lpwer, sslinesnfifines hens.' e .C/ner. this .seligslriee @am me@ .was @gwn-,vf shawls., 1 .lof-rie., isis 1osed,.rint o theme oilthe sirf'gandmsihes t edefiating stem ldovfri fpes tlrerelii'k .Yalye ,substantially.simltaneoiisly Withl the 'Sals-fe theeasirfg;

p cap of Figs.

la assisi sliortenqg. F l

tov insure proper swlve sleeve be used the sealing member should itself be loosely assembled in its chamber.

I intend the caps, sealing members and swivelling sleeves shown in the several forms to be used interchangeably. Thus, for example, the one piece cap of Fig. k3 may-be employed with the sealingV ball of Figs. l and 2.

Having thus described my inventiqnand without limiting myself to the precise constructions shown, what I claim and desire to secure by Letters Patent is:

In a valve cap for pneumatic tire valves,

a body portion having a chamber therein, y and having a neck portion adapted to screwr on to the reduced upper end of the valve casing, a swivelling sleeve, and a soft vulcanized rubber ball loosely assembled in said chamber, such sleeve receiving the ball, and .Such ball being too large to be passed through the bore of said neck either into or out of the chamber of the valve cap and being adapted to seal the casing and open the check of the tire valve When the cap is screwed down, the walls of the chamberv being permanently closed against Withdrawal of the sleeve and ball.

In testimony whereof, I have hereunto subscribed my name. l

WILLIAM H. DAVID. 

